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. PUBLIC HEALTH SERVICES <br /> �, uaN <br /> fir= �Q...•:•;...,.� <br /> .SAN TOAQUL F COT NFry � c <br /> �IVERONLIIMNT_U HEALTH D€VISION <br /> Karen Frust, LvLD., IM21 ., Health Officer ' <br /> 304 East Weber Avenue, Third Floor - Stockton, Ck 95202 <br /> 209/468-3420 <br /> SEP 2 59? <br /> To Whom It May Concent <br /> ANALYSIS REQUIRED FOR OXYGENATE COMPOUNDS <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) is under <br /> Local Oversight Program (LOP) contract with the California State Water Resources Control <br /> Board (SWRCS) to provide oversight for the investigation and cleanup of unauthorized releases <br /> From underground storage tanks. This contract includes a provision for technical support by the <br /> California Central Valley Regional Water Quality Control Board (CVRWQC8). <br /> PHS/EHD has recently received a fetter front the CVRWQCS that provides guidance an how to <br /> analyze for the oxygenated compounds in gasoline until a 'definitive protocol" can be <br /> established. Based on this fetter, PHSIEHD is directing you to analyze samples from all of <br /> your monitoring wells for Tertiary Butyl Alcohol (—i BA), Methyl Ternary Butyl Ether(MTBE}, Di- <br /> isopropyl ether (DIPE), Ethyl Tertiary Butyl Ether(ET8E) and Tertiary Amyl Methyl Ether <br /> (TAME) by EPA method 8260. PHSIEHD will require analysis of samples for Methanol and <br /> Ethanol where there is reason to believe that these compounds were stored in the underground <br /> tank(s). <br /> PHS/EHD requires quarterly sampling of all wells where the presence of oxygenates is <br /> confirmed by EPA method 8260. Modification of this required sampling such as number of wells <br /> sampled, sampling frequency and method of analysis may be granted only aver initial sample <br /> results are reviewed by PHSIEHD. Any modification of the required sampling must have <br /> PHSIEHD approval prior to implementation. <br /> For additional information please call your LOP contact <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> l - 0 <br /> Margaret Lagorio, REHS <br /> LOP Supervisor <br /> encs. <br /> A Division of San foaauin County Health Cate Services <br />